Safety razor blade dispenser



June 11, 1963 L. K. KUHNL SAFETY RAZOR BLADE DISPENSER 5 Sheets-Sheet 1 Filed 0G12. 14, 1959 N V EN TOR. @Ufa/Ud,

Mud/wwf am June 1l, 1963 L.. K. KUHNI. 3,093,256

SAFETY RAZOR BLADE DISPENSER Filed Oct. 14, 1959 l 3 Sheets-Sheet 2 June 1l, 1963 L. K. KUHNI. 3,093,256

SAFETY RAZOR BLADE DISPENSER Filed Oct. 14, 1959 3 Sheets-Shea?I I5 United States Patent O 3,093,266 SAFETY RAZR BLADE DESPENSER Leopold Karl Kuhnl, Stratford, Conn., assigner to Everslsarp, Inc., New York, NY., a corporation of Delaware Filed 9ct. 14, 1959, Ser. No. 846,342 10 Claims. (Cl. 221-232) The present invention is concerned with a dispenser having a compartment containing a stack fof new safety razor blades, which blades are adapted to be ejected from the dispenser one at a time for placement in the head of a typical safety razor.

The general object of the invention is to provide la new and improved safety razor blade dispenser of the type described.

While the foregoing statements are indicative in `a general way of the nature `of the invention other more specific objects and advantages will be apparent to those skilled in the tart upon a full understanding of the construction, arrangement and function of the several parts which have been combined to form the improved blade dispenser.

A preferred embodiment of the invention is presented herein by way of exemplication but it will of course be appreciated that the invention is susceptible of incorporation in structurally modified forms coming equally within the scope of the lappended claims.

In the accompanying drawings:

FIG. 1 is a perspective view, from the top, of a safety razor blade dispenser embodying the invention;

FIG. 2 is a perspective view, from the bottom, of the dispenser;

FIG. 3 is a top plan view of the assembled dispenser;

FIG. 4 is a bottom plan view of the same;

FIG. 5 is a side elevational view of the same;

FIG. 6 is a front end view of the same;

FIG. 7 is a rear end view of the same;

FIG. 8 is an enlarged vertical section, taken generally on the line 8 8 of FIG. 3;

FIG. 9` is a vertical section, similar to FIG. 8, showing a blade being ejected from the dispenser;

FIG. l is a ytop plan view of the body member of the dispenser;

FIG. 1l is a bottom plan view of the same;

FIG. 12 is a side elevational view of the same;

FIG. 13 is a front end view of the same;

FIG. 14 is -a vertical section, taken generally on the line 14-14 of FIG. 10;

FIG. l is a top plan view `of the cover plate of the dispenser;

FIG. 16 is a bottom plan View of the same;

FIG. 17 is a side elevational view of the same;

FIG. 18 is a front end view of the same;

FIG. 19 is a top plan view of the bottom plate of the dispenser;

FIG. 2O is a bottom plan View of the same;

FIG. 2l is a side elevational view of the same;

FIG. 22 is a front end view of the same;

FIG. 23 is a rear end view of the same;

FIG. 24 is a top plan view of the throat member of the dispenser;

FIG. 25 isa bottom plan view of the same;

FIG. 26 is ya side elevational view of the same;

FIG. 27 is a front end view of the same;

FIG. 28 is a vertical section, taken generally on the line 28--28 of FIG. 24;

FIG. 29 is an enlarged 4top plan view of the plunger of the dispenser;

FIG. 30 is `an enlarged bottom plan View of the same; FIG. 3l is an enlarged `side elevational View of the same;

FIG. 32 is an enlarged front end view lof the same;

FIG. 33 is an enlarged rear end View of the same;

FIG. 34 is a side elevational view of the spring of the dispenser;

FIG. 35 is ya top plan view of the same; `and FIG. 36 is an enlarged section, taken generally on the line 36-36 of FIG. 34.

The new dispenser shown in FIGS. l to 36 inclusive includes a body member 4tl, which may be formed of plastic or other similar material, a cover plate 4l and a bottom plate 42, both of which are preferably formed of spring metal, a metal throat member 43, a plunger or pusher 44, and a leaf spring 45 of generally Z-shaped configuration. The body member 40 and the cover and bottom plates 41 and 42, which when assembled form the housing of the dispenser, are horizontally elongated and generally rectangular and, as shown in plan view in FIGS. 10, 15 and 19, respectively, they may be slightly reduced in width toward the rear ends thereof.

The body member 4h which is hollow `and open at its bottom is characterized by spaced side walls 46, a rear end wall 47, a front wall 4S which is inclined slightly downwardly and rearwardly and is provided with a recess 49 in the front surface thereof, and by an upper wall Sil which extends across the upper edges of the side walls 46 with the front edge thereof being spaced rearwardly from the front wall 48. A stack 51 of new double edge safety razor blazes 52 is adapted to be positioned within the hollow body member 40 with the uppermost blade pressed upwardly against the upper wall 50 thereof. In order to retain the stack S1 properly positioned within the body member 4t?, front and rear pairs of positioning ribs 53 are provided within the body member 40; integral therewith, for engagement in a well-known manner with the reduced-in-width end portions of the blades 52.

The upper wall Sil of the body member 40 is provided with a centrally located longitudinally extending slot 55 between the ends of which the plunger 44 is slidable. The portions of the upper wall Sil disposed on opposite sides of the slot 55 are offset in `an upward direction whereby to provide a pair `of raised longitudinally extending slideways S6 on the top surface of the upper wall 5@ yand `a pair of recessed longitudinally extending slideways 57 on the under-surface of the upper wall Sil. Both the upper and lower slideways 56' and 57, respectively, extend horizontally for the greater part of their lengths but are inclined upwardly for a short distance at the forward end of the slot 55 to provide at -that point -a pair of small ramps 5S on the opposite side edges of the slot 55 at the forward end thereof for a purpose which will be fully disclosed hereinafter.`

The separate met-al throat member 43, which is generally right-angular in cross-section, is characterized by a downwardly extending portion 66 which is adapted to lit in a transversely extending, upwardly opening groove 61, which groove is formed in the front end ofthe body member 4d immediately to the rear of the front wall 48 thereof, and by a rearwardly extending portion 62 which abnts against the front edge of the upper wall 50 of the body member 40 and is supported on the upper edges of fthe side walls 46 thereof. The rearwardly extending portion 62 is provided with a centrally located rearwardly opening recess 63 for a purpose which will be disclosed hereinafter. The throat member 43 is provided with a precision-cut, forwardly opening horizontal exit Islot 64 which is disposed immediately beneath the plane of the upper wall Sli of the body member 40; Thus, the uppermost blade 52 in the stack 5l, which is .pressed against the upper wall Sti of the body member 40, has its front end aligned with the exit slot 64 and is adapted to be slid forwardly therethrough.

The bottom plate 42 which is generally flat is characterized by side edges 66 which are offset in an upward direction and which are adapted to tagainst the lower edges of the side walls 46 of the body member 4l) and by an upwardly and forwardly inclined front wall portion 67 which is vadapted to lit in the recess 49 formed in the front wall 48 of the body member 4G. The rear edge of the bottom plate 42 terminates forwardly of the rear end wall 47 of the body member 4th whereby to provide an entrance slot or gap 68 for use in inserting used blades into the dispenser. A centrally located generally rectangular recess 59 is formed in the front end of the bottom plate 42 and extends into both the dat and upwardly inclined portions thereof. A pair of positioning flanges 70 project upwardly from the portions of the side edges of the recess 69 which are disposed in the at portion of Ithe bottom plate 42. The purpose for the recess 69 and the positioning flanges 'fil will be fully disclosed hereinafter.

The cover plate 41 is characterized by a top wall 72 and by a pair of depending side walls 73 which, before assembly of the dispenser, converge slightly toward each other, The top wall '72 is of a size such that it fits over both the upper wall Sil of the body member dd and the rearwardly extending portion 62 of the throat member 43. The side walls 73 t against the sides of the body member 40' and are provided at their lower edges with inturned anges 74 which engage with and clamp the offset side edges 66 of the bottom plate 42 against the lower edges of the side walls 46 of the body member 4G. The rear ends of the inturned flanges 74 are each formed to provide an ear 75, which ears are adapted to be bent over the bottom edges of the side walls 46 of the body member 4l). The top wall 72 of the cover plate 4l is provided with a centrally located generally rectangular recess 76 which is of a size to receive the raised slideways 56 formed on the upper wall Sil of the body member 4l). The cover plate 41 serves to retain both the throat member 43 and the bottom plate 42 in assembled relationship with the body member 4G.

The leaf spring 45, which is of generally Z-shaped conguration, is provided in the dispenser for pressing the stack 51 of blades 52 Iupwardly `against the upper wall 5t) of the body member 4G. The spring 45 is characterized by an upper generally horizontal portion 78 which engages against the underside of the stack Si, a lower generally horizontal portion 79 which engages against the bottom plate 42, and by an intermediate diagonally extending connecting portion 80. The upper portion '7S is centrally offset in a longitudinal direction, as at 81, to increase the stiffness thereof. The upper rear portion of the spring 45 is disposed between the rear pair of positioning ribs 53 and the lower front portion of the spring 45 is disposed between the positioning flanges 79 on the bottom plate 42 whereby the spring is retained in a transversely centered position in the dispenser. After all of the other elements of the dispenser have been assembled, the spring 45 is inserted therein through the recess 69 formed in the bottom plate 42 to complete the assembly. When the spring 45 is assembled in the dispenser, the rear end of the lower portion 79 terminates somewhat forwardly of the rear edge of the bottom plate 42 whereby the bottom portion 79 and the intermediate portion 3@ provide a used blade compartment 82 into which used blades may be inserted through the entrance slot or gap 63.

The plunger or pusher 44 is characterized by a generally flat plate portion 85 which is located within the dispenser with the side edges thereof being slidably received in the recessed slideways '7 formed on the underside of the upper wall 5l) of the body member 49, by an integral reduced-in-width neck portion 36 which extends upwardly from the rear edge of the plate portion S5 and through the slot 55 in the upper wall 50, and by an integral finger-engageable portion 37 at the upper end of the neck portion 86. The linger-engageable portion 87 is formed to provide a pair of transversely extending downwardly facing shoulders 83 which are slidably engageable on the raised slideways 56 formed on the lupper surface of the upper wall 50. The rear edge of the flat plate portion 3S is provided on the underside thereof with a transversely extending abutment member 89 which extends downwardly therefrom a distance which is somewhat less than the thickness of one of the razor blades 52. Forward movement of the plunger 44 from its rearmost position (FIG. 8) results in engagement of the abutment member 89 with the rear edge of the uppermost blade only and forward movement of the uppermost blade ont of the dispenser through the exit slot 64.

ln order to provide means for guiding the forward movement of the uppermost double edge blade S2 as it is ejected from the dispenser, the underside of the ilat plate portion S5 of the plunger 44 is provided with a centrally located longitudinally extending rib 90 which is adapted to extend downwardly into guiding engagement in the centrally located slot formed in the blade. The rear end of the rib 9i) terminates forwardly of the abutment member 89 a distance equal at least to the longitudinal dimension of the non-slotted rear end portion of the blade 52. With this arrangement, a partially ejected blade may be drawn back into the dispenser upon rearward movement of the plunger 44 as a result of engagement of the rear end of the rib 90 with the rear end of the slot formed in Ithe blade.

When the plunger 44 is moved forwardly to the end of the slot 55, the shoulders 88 thereof ride up on the ramps 58 (FIG. 9) whereby to raise the plunger 44 sumciently to disengage the rib '90 from the slot in the blade being ejected and permit complete removal of the blade from the dispenser. The previously described rearwardly open ing recess 63 formed in the rearwardly extending portion 62 of the throat member 43 serves to accommodate the flat plate portion of the plunger 44 when the plunger is moved to its forwardmost position.

I claim:

1. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including a hollow body member against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, a spring within the chamber adapted to press the stack of blades upwardly against the upper wall of the body member, a relatively thick separate metal throat member of right-angular configuration having a vertically disposed front end portion and `a horizontally disposed portion ex tending rearwardly from the upper edge of said front end portion with said vertical and horizontal portions intertting with cutaway portions of the front end of the body member, which throat member is provided immediately beneath the plane of the upper wall of the body member with a narrow precision-cut forwardly opening horizontal slot through which the uppermost blade only in the stack is adapted to be slid forwardly, and a cover plate mounted on said body member and having portions overlying the top and sides of said horizontally disposed portion of said throat member for retaining said throat member in said cutaway portions of the body member.

2. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including a hollow body member of molded plastic material against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, a spring within the chamber adapted to press the stack of `blades upwardly against the upper wall of the body member, a plunger within the chamber for engagement with the uppermost blade, a relatively thick separate metal throat member of right-angular configuration having a vertically disposed front end portion and a horizontally disposed portion extending rearwardly from the upper edge of said front end portion with said vertical and horizontal portions interfitting with eutaway portions of the front end of the plastic body member, which throat member is provided immediately beneath the plane of the upper wall of the body member with a narrow precision-cut forwardly opening horizontal slot through which the uppermost blade only in the stack is adapted to be slid forwardly by the plunger, and Ia cover plate mounted on said body member and having portions engageable with the upper surface and side edges of said horizontally disposed portion of said throat member for retaining said throat member in said cutaway portions of said body member.

3. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said cham-ber including a hollow body member against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, a forwardly opening horizontal exit slot disposed at the front end of said body member immediately beneath .the plane of the upper wall thereof, a spring within the chamber adapted to press the stack of blades upwardly against the upper wall of the body member, a plunger which is slidable forwardly and rearwardly of said body member and which is characterized by a portion located within said chamber for engagement with the uppermost blade in the stack and by a linger-engageable portion disposed externally of said body member, and ramp means formed on said body member in the path of forward movement of said tinger-engageable portion of said plunger, which latter portion is adapted to engage said ramp means at the end of its forward movement whereby to shift said blade-engageable portion of said plunger out of engagement with the uppermost blade after the blade has been slid a substantial distance forwardly through said exit slot.

4. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including a hollow body member against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, a forwardly opening horizontal exit slot disposed at the front end of said body member immediately beneath the plane of the upper wall thereof, a spring within the chamber adapted to press the stack of blades upwardly against the upper wall of the body member, which upper wall is provided with a centrally located longitudinally extending slot, a plunger which is slidable in said slot forwardly and rearwardly of said body member and which is characterized lby a portion located within said chamber for engagement with the uppermost blade in the stack, a neck portion projecting upwardly through said slot in the upper wall of said body member, and by a linger-engageable portion disposed externally of said body member, and ramp means `formed on the upper wall of said body member adjacent the forward end of said slot and in the path of movement of said finger-engageable porti-on of said plunger, which latter portion is adapted to ride up on said ramp means at the end of its forward movement whereby to disengage said blade-engageable portion of said plunger from the uppermost blade after the blade has been slid a substantial distance forwardly through said exit slot.

5. In a double edge safety razor blade dispenser, a chamber in which a stack of new double edge blades is adapted to be positioned, said chamber including a hollow body member against the upper wall =of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, a forwardly opening horizontal exit slot disposed at the front end of said body member immediately beneath the plane of the upper wall of said body member, a spring within the chamber adapted to press the stack of double edge blades upwardly against the upper wall of the body member, which upper wall is provided with a centrally located longitudinally extending slot, a plunger which 4is slidable forwardly and rearwardly between the ends of said slot and which is characterized by a portion located within said chamber for engagement -with the uppermost blade in the stack, a neck portion projecting upwardly through said slot, and by a nger-engageable portion disposed externally of said body member, said blade-engageable portion of said plunger being provided with abutment means engageable with the rear edge of the uppermost blade only and with a longitudinally extending rib engageable in the centrally located slot formed in the uppermost blade whereby to both guide the forward movement of the uppermost blade through said exit slot upon forward movement of said plunger and permit retracting movement thereof from -said exit slot upon rearward movement of said plunger, and ramp means formed on the upper wall of said body member adjacent the forward end lof said slot and in the path of forward movement of said finger engageable portion of said plunger, which latter portion is adapted to ride up on said ramp means at the end of its forward movement whereby to raise said longitudinally extending rib out of engagement with the centrally located slot formed in the uppermost double edge blade and permit removal of said blade from the dispenser.

6. ln a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including an elongated generally rectangular hollow body member against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, said body member being open at its bottom, a bottom plate which ts against the lower edges of the sides lof the body member, a complementary cover plate which tits about the top and sides of the body member and is provided along the lower edges of its `sides with inturned flanges, which flanges engage with and clamp the side edges of the bottom plate against the lower edges of the sides of the body member, a spring within the chamber which is supported on said bottom plate and is adapted to press the stack of blades upwardly against said upper wall of the body member, a forwardly opening horizontal exit slot at the front end of the dispenser immediately beneath the plane of the upper wall of said body member through which the uppermost blade only in the stack is adapted to be slid forwardly, a plunger slidably tmounted in the chamber above said stack of new blades and engageable with the uppermost blade for moving the blade forwardly through said slot, and means for automatically raising said plunger out of engagement with the uppermost blade at the end of said plunger forward movement.

7. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including an elongated generally rectangular hollow body member of molded plastic material against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, said body member being open at its bottom, a bottom plate which ts against the lower edges of the sides of the body member, a complementary cover plate which ts about the top and sides of the body member and is provided along the lower edges of its sides with inturned flanges, which flanges engage with and clamp the side edges lof the bottom plate against the lower edges of the sides of the body member, a spring within the chamber adapted to press the stack of blades upwardly against said upper wall of .the body member, and a separate right-angular relatively thick metal throat member characterized by a horizontally disposed rear portion and a depending front end portion fitted in cutaway portions of the front end of the body member which throat member is provided immediately beneath the plane of the upper wall of the body member with a narrow precision-cut forwardly opening horizontal exit slot through which the uppermost blade only in the stack is adapted to be slid forwardly, said cover plate overlying the upper surface and side edges of said rear portion of said metal throat member to retain same in said cutaway portions of said body member.

8. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including an elongated generally rectangular hollow body member of molded plastic material against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, said body member being open at its bottom, a bottom plate which fits against the lower edges of the sides of the body member, a complementary cover plate which tits about the top and sides of the body member and is provided along the lower edges of its sides with inturned flanges, which flanges engage with and clamp the side edges of the bottom plate against the lower edges of the sides of the body member, a spring within the chamber adapted to press the stack of blades upwardly against said upper wall of the body member, a separate relatively thick metal throat member of rightangular configuration having a horizontally disposed rear portion and a depending front end portion with both portions being fitted in cut-away portions of the front end of the body member, which throat member is provided immediately beneath the plane of the upper wall of the body member with a narrow precision-cut forwardly opening horizontal exit slot through which the uppermost blade only in the stack is adapted to be slid forwardly, a front portion of said cover plate overlying the upper surface and side edges of the horizontally disposed rear portion of said throat member whereby to retain same in said cut-away portions of the body member, and a plunger within the chamber for abutment with the rear edge of the uppermost blade for moving the blade forwardly through said slot.

9. In a safety razor blade dispenser, a chamber in which a stack of new blades is adapted to be positioned, said chamber including an elongated generally rectangular hollow body member -against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, said 'oody member being open at its bottom, a bottom plate `which lits against the lower edges of the sides of the body member, a complementary cover plate which ts about the top and sides of the body member and is provided along the lower -edges of its sides with inturned flanges, which flanges engage with and clamp the side edges of the bottom plate against the lower edges of the sides of the body member, a spring within the chamber adapted to press the stack of blades upwardly against said upper wall of the body member, a forwardly opening horizontal exit slot at the front end of the dispenser immediately beneath the plane of the upper wall of said body member through which the uppermost blade only in the stack is adapted to be slid forwardly, a plunger which is slidable forwardly and rearwardly of the body member and which is characterized by a portion located within said chamber for engagement with the uppermost blade in the stack and by a nger-engageable portion disposed externally of said body member, and ramp means formed on said body member in the path of forward movement of said linger-engageable portion of said plunger, which latter portion is adapted to engage said ramp means at the end of its forward movement whereby to shift said bladeengageable portion of said plunger out of engagement with the uppermost blade after the blade has been slid a substantial distance forwardly through said exit slot.

10. In a double edge safety razor blade dispenser, a chamber in which a stack of new double edge blades is adapted to be positioned, said chamber including an elongated generally rectangular hollow body member against the upper wall of which the uppermost blade in the stack is adapted to be positioned for forward sliding movement, said body member being open at its bottom, a bottom plate which fits against the lower edges of the sides of the body member, a complementary cover plate which tits about the top and sides of the body member and is provided along the lower edges of its sides with inturned flanges, which flanges engage with and clamp the side edges of the bottom plate against the lower edges of the sides of the body member, a spring within the chamber adapted to press the stack of blades upwardly against said upper wall of the body member, which upper wall is provided with a centrally located longitudinally extending slot, a forwardly opening horizontal exit slot at the front end of the dispenser immediately beneath the plane of the upper wall of said body member through which the uppermost blade only in the stack is adapted to be :slid forwardly, a plunger which is slidable forwardly and rearwardly of the body member between the ends of said slot and which is characterized by a portion located within said chamber for engagement with the uppermost blade in the stack, by a neck portion projecting upwardly through said slot in the upper wall of said body member, and by a fingerengageable portion dispo-sed externally of said body member, said blade engageable portion of said plunger being provided with abutment means engageable with the rear edge of the uppermost blade only and with a longitudinally extending rib engageable in the centrally located slot formed in the uppermost double edge blade whereby to both guide the forward movement of the uppermost blade through said exit slot upon forward movement of said plunger and permit retracting movement thereof from said exit slot upon rearward movement of said plunger, and ramp means formed on the upper wall of said body member adjacent the forward end of said slot and in the path of forward movement of said inger-engageable portion of said plunger, which latter portion of said plunger is adapted to ride up on said ramp means at the end of its forward movement whereby to raise said longitudinally extending rib out of engagement with the centrally located slot formed in the uppermost double edge blade and permit removal of said blade from the dispenser.

References Cited in the le of this patent UNITED STATES PATENTS 1,503,144 Warwick July 29, 1924 1,697,366 Opfergelt Jan. 1, 1929 1,710,828 Keen Apr. 30, 1929 1,908,115 Chadwick May 9, 1933 2,348,303 Muros May 9, 1944 2,352,113 Muros s `lune 20, 1944 2,418,677 Testi Apr. 8, 1947 2,624,453 Muros Jan. 6, 1953 2,641,358 Santo June 9, 1953 2,653,704 Nelson Sept. 29, 1953 2,776,743 Treiss Jan. 8, 1957 FOREIGN PATENTS 73,178 Denmark Oct. 8, 1951 839,403 Germany May 19, 1952 

1. IN A SAFETY RAZOR BLADE DISPENSER, A CHAMBER IN WHICH A STACK OF NEW BLADES IS ADAPTED TO BE POSITIONED, SAID CHAMBER INCLUDING A HOLLOW BODY MEMBER AGAINST THE UPPER WALL OF WHICH THE UPPERMOST BLADE IN THE STACK IS ADAPTED TO BE POSITIONED FOR FORWARD SLIDING MOVEMENT, A SPRING WITHIN THE CHAMBER ADAPTED TO PRESS THE STACK OF BLADES UPWARDLY AGAINST THE UPPER WALL OF THE BODY MEMBER, A RELATIVELY THICK SEPARATE METAL THROAT MEMBER OF RIGHT-ANGULAR CONFIGURATION HAVING A VERTICALLY DISPOSED FRONT END PORTION AND A HORIZONTALLY DISPOSED PORTION EXTENDING REARWARDLY FROM THE UPPER EDGE OF SAID FRONT END PORTION WITH SAID VERTICAL AND HORIZONTAL PORTIONS INTERFITTING WITH CUTAWAY PORTIONS OF THE FRONT END OF THE BODY MEMBER, WHICH THROAT MEMBER IS PROVIDED IMMEDIATELY BENEATH THE PLANE OF THE UPPER WALL OF THE BODY MEMBER WITH A NARROW PRECISION-CUT FORWARDLY OPENING HORIZONTAL SLOT THROUGH WHICH THE UPPERMOST BLADE ONLY IN THE STACK IS ADAPTED TO BE SLID FORWARDLY, AND A COVER PLATE MOUNTED ON SAID BODY MEMBER AND HAVING PORTIONS OVERLYING THE TOP AND SIDES OF SAID HORIZONTALLY DISPOSED PORTION OF SAID THROAT MEMBER FOR RETAINING SAID THROAT MEMBER IN SAID CUTAWAY PORTIONS OF THE BODY MEMBER. 